Merge pull request #1053 from Gerrygames/book_fix

fix #1044

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_1to1_13/Protocol1_13_1To1_13.java

@@ -44,6 +44,13 @@ public class Protocol1_13_1To1_13 extends Protocol {
             public void registerMap() {
                 map(Type.FLAT_ITEM);
                 map(Type.BOOLEAN);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        Item item = wrapper.get(Type.FLAT_ITEM, 0);
+                        InventoryPackets.toServer(item);
+                    }
+                });
                 handler(new PacketHandler() {
                     @Override
                     public void handle(PacketWrapper wrapper) throws Exception {